Transmission lifting attachment for a mobile lifting jack



May 29, 1956 J. M. TURNER TRANSMISSION LIFTING ATTACHMENT FOR A MOBILE LIFTING JACK 2 Sheets-Sheet 1 Filed Feb. 12, 1954 INVENTOR.

. JAMES M. Turzuesz 77Zmaz5m MOW ATTOIZHEYS o e 5 q 2 Sheets-Sheet 2 3 w w M o (0 a r {w l 1 1.. V1\8 M 5 J AT To an E'YS May 29, 1956 J. M. TURNER TRANSMISSION LIFTING ATTACHMENT FOR A MOBILE LIF'TING JACK Filed Feb. 12, 1954 United States Patent TRANSMISSION LIFTING ATTACHIVIENT FOR A MOBILE LIFTING JACK James M. Turner, San Fernando, Calif.

Application February 12, 1954, Serial N 0. 409,908

4 Claims. (Cl. 254-134) This invention relates to a transmission lift-ing attachment for a mobile lifting jack and more particularly a jack of the type which includes a load carrying saddle having a vertically disposed opening extending therethrough.

Floor jacks of the type to which this invention relates generally comprise a relatively long low chassis mounted on wheels or rollers to which chassis is pivotally connected adjacent one end a load lifting lever having connected thereto hydraulic mechanism by which the lever is raised to engage and lift a load. Such a jack is disclosed in United States Patent No. 2,629,583, and includes a load carrying saddle having a central opening extending therethrough.

The primary object of this invention is to provide an attachment for a jack such as that above described which may be used for lifting hydraulic transmissions and holding them at various angles during the servicing or repair thereof.

Another object is to rigidly secure the transmission to the jack table so that irrespective of the position to which the table is tilted, the transmission will be retained thereon.

A further object is to enable the transmission to be tilted to various angles so as to render the various parts thereof accessible for servicing or repair.

The above and other objects may be attained by employing this invention which embodies among its features a column mounted on the saddle of the lifting jack and extending vertically upwardly therefrom, a table mounted on the column for universal movement above the upper end thereof, means carried by the column and operatively engaged with the table for holding said table in a selected position adjacent the upper end of the column, and work holders carried by the table for adjustment thereon.

Other features include bars carried by the table for adjustment transversely thereof, a stop carried by the table and extending outwardly therefrom adjacent one end thereof and substantially midway between opposite sides thereof, and fingers carried by the bars and extending outwardly therefrom for engaging work mounted thereon, and a flexible member carried by the table and adapted to be extended around work mounted thereon between the fingers to secure the work to the table.

In the drawings:

Figure 1 is a side view of a transmission lifting attachment embodying the features of this invention and showing it mounted in operative position on a conventional mobile floor jack;

Figure 2 is a sectional view taken substantially on the line 22 of Figure 1;

Figure 3 is a horizontal sectional view taken substantially on the line 33 of Figure l on a somewhat enlarged scale; and

Figure 4 is an enlarged vertical sectional view taken substantially on the line 4-4 of Figure 2.

Referring to the drawings in detail, a conventional jack designated generally I is provided with a conventional lift arm designated generally A which carries adjacent its free end a conventional saddle member designated S having a central opening 0 extending therethrough.

Mounted on the saddle member S is the column 10 of this invention which carries a downwardly extending externally screw threaded stud 12 which is adapted to be projected through the opening 0 in the saddle S and clampingly engaged with the saddle by means of a conventional nut 14 which is threadedly engaged with the stem 12, as will be readily understood upon reference to Figure 4. Carried by the column 10 and extending upwardly from the upper end thereof is a spherical head 16 upon which is mounted for universal movement a hemispherical socket member 18 having adjacent its larger diameter an outwardly extending flange 20. Encircling the head 16 below the socket member 18 is a clamping ring 22 carrying adjacent its upper end an outwardly extending flange 24 and these flanges are provided with aligning openings for the reception of clamping bolts 26 fitted with nuts 28 which, when tightened, cause the clamping ring 22 to frictionally engage the head 16 and hold the socket member 18 in a selected position of adjustment on the head.

Welded or otherwise secured to the upper end of the socket member 18 is a collar 28 to the upper end of which is welded or otherwise rigidly secured a table 30, which is preferably of elongated rectangular shape and is provided adjacent one end with elongated spaced parallel longitudinally extending slots 32. A longitudinally extending tongue 34 is carried by the table and projects beyond the end of the table 30 remote from that having the slots 32 and carried by the tongue and extending upwardly therefrom adjacent the end thereof remote from the table 30 is a stop 36 against which one end of the work W is engaged, as will be readily understood upon reference to Figure 1. Extending through the table adjacent the end thereof carrying the tongue 34 are transversely spaced openings 38, the purpose of which will hereinafter appear.

Extending through the openings 38 are externally screw threaded studs 40 carrying at their upper ends elongated clamping heads 42 carrying adjacent opposite ends downwardly extending guide flanges 44. Mounted on the table 30 for sliding movement adjacent opposite sides of the studs 40 and between the studs 40 and the guide flanges 44 are bars 46 and 48 each carrying adjacent one end outwardly extending stop fingers 5t) and 52 which cooperate with the stop 36 in retaining the work W inproper position on the table 30. Flanges 54 and 56 are carried by the bars 46 and 48, respectively, and extend outwardly therefrom in a direction opposite the stop fingers 5t) and 52 to engage opposite sides of the table 30 and limit outward movement of their respective bars.

Extending through the slots 32 are externally screw threaded studs 58 carrying elongated laterally extending heads 60 which are provided adjacent opposite ends with downwardly extending guide flanges 62. Mounted for sliding movement between the studs 58 and guide flanges 62 are transversely extending bars 64 and 66, each carrying adjacent one end an outwardly extending stop finger 68 and 70, respectively, and the opposite ends of the bars 64' and 66 are provided with downturned flanges 72 and 74, respectively, which are adapted to engage opposite sides of the table 30 to limit outward movement of the bars 64 and 66, respectively.

Carried by the table 30 and extending outwardly from one side thereof is an eye 76 to which is connected one end of a retractile coil spring 78, the opposite end of which carries a chain 80 which, as illustrated in Figure l, is adapted to extend around a transmission supported on the table 30 and engaged in a retainer 82 carried by the table 30 and extending downwardly from the side thereof remote from the eye 76.

In use, it will be obvious that with the column 10 mounted on the jack J, as illustrated in Figures 1, 2 and 4, the column may be elevated to a position in which the table 30 engages the underside of a transmission whereupon the bars 46, 48, 64 and 66 are adjusted to cause the fingers 50, 52, 68 and 70 carried thereby to engage opposite sides of the transmission W, while the stop finger 36 is engaged with one end of the transmission. With the bars properly adjusted, their respective clamp studs are tightened to hold them in the selective positions and the chain 80 is extended around the work, as illustrated in Figure 1, andconnected to the retainer 82. By thus extending the chain around the work, the spring 78 will be placed under tension to retain the chain taut and the work in place on the table. Obviously, by loosening the nuts 28 on the bolts 26, the socket member 18 may be adjusted to a selected position on the head 16 and upon tightening the nuts 28, the clamp ring 22 will frictionally engage the head and draw the socket member 18 into frictional engagement with the head 16 to hold the table 30 at a selected angle for permitting the re moval of the transmission from the chassis of the vehicle in which it was located or for rendering accessible certain portions of the transmission so that work may be conducted thereon.

From the foregoing it is obvious that the attachment may be readily mounted on a conventional mobile floor jack and due to the fact that the pedestal elevates the table above the saddle S of the jack, it will be evident that transmissions may be readily removed or replaced in the chassis of the vehicle.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What is claimed is:

1. A mobile jack attachment for supporting a heavy object comprising: a column including means at one end thereof to detachably connect the same to a jack; a generally horizontal table on the other end of the column; spaced pairs of bars carried by the table, the bars of each pair extending in closely spaced, parallel relation, one bar of each pair including an upwardly projecting finger at one end and the other bar of the same pair including an upwardly projecting stop finger at its opposite end, the bars of each pair being slidable on the table in the direction of their lengths independently of each other;

hold-down clamps each extending transversely of and overlying both of the bars of each pair; and means connecting each clamp to the table and adapted for drawing the clamp toward the table, to bind the bars between the table and clamps against movement from selected positions to which the bars are slidably adjusted.

2. A mobile jack attachment for supporting a heavy object comprising: a column including means at one end thereof to detachably connect the same to a jack; a gen erally horizontal table on the other end of the column; spaced pairs of bars carried by the table, the bars of each pair extending in closely spaced, parallel relation, one bar of each pair including an upwardly projecting finger at one end and the other bar of the same pair including an upwardly projecting stop finger at its opposite end, the bars of each pair being slidable on the table in the direction of their lengths independently of each other; hold-down clamps each extending transversely of and overlying both of the bars of each pair; and means connecting each clamp to the table and adapted for drawing the clamp toward the table, to bind the bars between the table and clamps against movement from selected positions to which the bars are slidably adjusted, each clamp including means engaging the bars which it overlies against movement relative to the clamps in a direction transversely of the bars, said clamps and the first named means associated with at least one pair of bars being mounted on the table for joint adjustment in the second named direction, thus to bodily adjust each pair of bars, and the clamps and first named means associated therewith, in said named direction.

3. A mobile jack attachment for supporting a heavy object comprising: a. column including means at one end thereof to detachably connect the same to a jack: a generally horizontal table on the other end of the column; spaced pairs of bars carried by the table, the bars of each pair extending in closely spaced, parallel relation, one bar of each pair including an upwardly projecting finger at one end and the other bar of the same pair including an upwardly projecting stop finger at its opposite end, the bars of each pair being slidable on the table in the direction of their lengths independently of each other; a plurality of hold-down clamps spaced longitudinally of each pair of bars, said clamps extending transversely of and overlying both of the bars of each pair, each clamp including at its opposite ends depending guide flanges engaging the outer longitudinal edges of the bars over which the clamp extends; studs secured to and depending from the several clamps, said studs extending through the table and being disposed in the space between the bars of each pair in engagement with the inner longitudinal edges of the bars to cooperate with the guide flanges in holding the bars against movement relative to their associated clamps and studs in a direction transversely of the bars; and nuts threaded on the studs at the underside of the table for drawing the clamps toward the table to bind the bars between the table and clamps against movement from selected positions to which the bars are slidably adjusted.

4. A mobile jack attachment for supporting a heavy object comprising: a column including means at one end thereof to detachably connect the same to a jack: a generally horizontal table on the other end of the column; spaced pairs of bars carried by the table, the bars of each pair extending in closely spaced, parallel relation, one bar of each pair including an upwardly projecting finger at one end and the other bar of the same pair including an upwardly projecting stop finger at its opposite end, the bars of each pair being slidable on the table in the direction of their lengths independently of each other; a plurality of hold-down clamps spaced longitudinally of each pair of bars, said clamps extending transversely of and overlying both of the bars of each pair, each clamp including at its opposite ends depending guide flanges engaging the outer longitudinal edges of the bars over which the clamp extends; studs secured to and depending from the several clamps, said studs extending through the table and being disposed in the space between the bars of each pair in engagement with the inner longitudinal edges of the bars to cooperate with the guide flanges in holding the bars against movement relative to their associated clamps and studs in a direction transversely of the bars; and nuts threaded on the studs at the underside of the table for drawing the clamps toward the table to bind the bars between the table and clamps against movement from selected positions to which the bars are slidably adjusted, the studs and clamps associated with at least one pair of bars being mounted on the table for adjustment in a direction transversely of. the bars, thus to bodily adjust said one pair of bars and clamps and studs associated therewith in said transverse direction.

References Cited in the file of this patent UNITED STATES PATENTS 1,759,165 Mayer May 20, 1930 2,189,010 Lewis Feb. 6, 1940 2,621,891 Marsh Dec. 16, 1952 

